UIScrollView subclass that scrolls when the user tilts the device.

##Usage##

• Change the class of your UIScrollView to TiltingScrollView.
• When your view controller appears on screen (most cases in viewWillAppear or viewDidAppear), call scrollView.setTiltingEnabled(true).
• If at any point you want to stop the tilt-to-scroll, call scrollView.setTiltingEnabled(false). This will automatically set scrollView.scrollingEnabled = true.
• You can recalibrate the scroll view at any point by calling scrollView.calibrate(). I recommend adding a button that allows the user to choose to recalibrate in order to redefine the angle at which the scroll view goes up and down.

##Public Variables##

/// Factor by which the accelerometer data is multiplied to scroll the view. Larger values cause faster scrolling.

public var tiltingFactor: CGFloat = 20

##Public Methods##

/// Enables or disables the tilting behavior of the scroll view.
/// - true: Tilting the device causes the scroll view to scroll. `scrollingEnabled = false`
/// - false: Tilting the device does nothing. `scrollEnabled = true`

public func setTiltingEnabled(tiltingEnabled: Bool)

/// Resets the internal calculations to use the current angle of the device as the reference point.
/// At the device's current angle, the scroll view will not scroll.

public func calibrate()

If you have any issues or suggestions, please create an issue or a pull request (preferred :). Revisions and improvements are always welcome.

You can contact me on Twitter at @ERDekhayser.